95 lines
2.2 KiB
C
95 lines
2.2 KiB
C
/* Copyright (C) 2023 Aryadev Chavali
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* You may distribute and modify this code under the terms of the
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* GPLv2 license. You should have received a copy of the GPLv2
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* license with this file. If not, please write to:
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* aryadev@aryadevchavali.com.
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* Created: 2023-10-15
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* Author: Aryadev Chavali
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* Description: Virtual machine implementation
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*/
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#ifndef RUNTIME_H
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#define RUNTIME_H
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#include <stdlib.h>
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#include "./base.h"
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#include "./inst.h"
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#define VM_BYTE_REGISTERS 8
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#define VM_WORD_REGISTERS 8
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#define VM_FLOAT_REGISTERS 8
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typedef struct
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{
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struct Registers
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{
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word ret;
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byte b[VM_BYTE_REGISTERS];
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word w[VM_WORD_REGISTERS];
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f64 f[VM_FLOAT_REGISTERS];
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} registers;
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struct Stack
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{
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byte *data;
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word ptr, max;
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} stack;
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struct Program
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{
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inst_t *instructions;
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word ptr, max;
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} program;
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} vm_t;
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void vm_load_stack(vm_t *, byte *, size_t);
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void vm_load_program(vm_t *, inst_t *, size_t);
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void vm_execute(vm_t *);
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void vm_push_byte(vm_t *, data_t);
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void vm_push_word(vm_t *, data_t);
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void vm_push_float(vm_t *, data_t);
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typedef void (*push_f)(vm_t *, data_t);
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static const push_f PUSH_ROUTINES[] = {
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[OP_PUSH_BYTE] = vm_push_byte,
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[OP_PUSH_WORD] = vm_push_word,
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[OP_PUSH_FLOAT] = vm_push_float,
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};
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void vm_push_byte_register(vm_t *, word);
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void vm_push_word_register(vm_t *, word);
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void vm_push_float_register(vm_t *, word);
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typedef void (*push_reg_f)(vm_t *, word);
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static const push_reg_f PUSH_REG_ROUTINES[] = {
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[OP_PUSH_BYTE_REGISTER] = vm_push_byte_register,
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[OP_PUSH_WORD_REGISTER] = vm_push_word_register,
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[OP_PUSH_FLOAT_REGISTER] = vm_push_float_register,
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};
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void vm_mov_byte(vm_t *, data_t, word);
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void vm_mov_word(vm_t *, data_t, word);
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void vm_mov_float(vm_t *, data_t, word);
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typedef void (*mov_f)(vm_t *, data_t, word);
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static const mov_f MOV_ROUTINES[] = {
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[OP_MOV_BYTE] = vm_mov_byte,
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[OP_MOV_WORD] = vm_mov_word,
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[OP_MOV_FLOAT] = vm_mov_float,
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};
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data_t vm_pop_byte(vm_t *);
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data_t vm_pop_word(vm_t *);
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data_t vm_pop_float(vm_t *);
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typedef data_t (*pop_f)(vm_t *);
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static const pop_f POP_ROUTINES[] = {
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[OP_POP_BYTE] = vm_pop_byte,
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[OP_POP_WORD] = vm_pop_word,
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[OP_POP_FLOAT] = vm_pop_float,
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};
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#endif
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